[monkeyhatfork]

PB is personel best, samba is a loss of motor control, read through the start freediving thread in the beggining freediving forum, take a course-the best money you will ever spend, likely to double your pb's and learn technique and safety correctly, as good as this site is, thier is a limit to what you can learn online. you can loose motor control and black out static but it's relatively safe as long as you are reclined.